Miss Marple, Agatha Christie’s deceptively mild spinster sleuth, is being treated to a few days’ holiday by her niece, staying at Bertram’s Hotel, a dignified, unostentatious establishment tucked away in a back street of busy Mayfair. Here is a place where sedate upper class ladies, retired military gentlemen and the higher echelons of the clergy can indulge in the comforts of a bygone age. But Miss Marple begins to feel uneasy. Something sinister lurks beneath the polished veneer.

This is the very first Poirot/Hastings story. Set in 1916, we meet Captain Hastings as he is invalided out of the Great War and goes to convalesce at Styles Court, the family home of his great friend, John Cavendish. By an extraordinary coincidence, billeted in the village is a brilliant little retired detective with an egg-shaped head, who made a considerable impression on the Captain when he was in Belgium. Styles is not a happy household and in the blistering summer heat, tensions mount.

After the death of her husband, Dolly Bantry sold Gossington Hall to the former film star Marina Gregg and her husband. When the glamorous couple decide to throw a benefit party for the local hospital, the grounds are thronged with curious visitors, and for one of them, the day ends in tragedy. As Marina is serving cocktails in the house, she is cornered by the excitable Heather Babcock, who chatters away about their former meeting about eleven years ago before spilling her daiquiri all over herself and Marina.

It's very easy to kill - so long as no one suspects you.' So says Miss Pinkerton when ex-policeman Luke Fitzwilliam meets her on a train. Luke doesn't take much notice of this little old lady's story about a serial killer on the loose in her village - until her predictions start to come true, when he feels compelled to check it out. Very soon the race is on to prevent any more murders...

A Radio 4 full-cast dramatisation starring June Whitfield as the deceptively mild Miss Marple with Ian Lavender, Joan Sims and Susannah Harker. Elspeth McGillicuddy is down from Scotland for a holiday and boards the 4:50 train from Paddington station to visit her friend, Miss Marple. During the journey, another train pulls alongside, and through the window Mrs McGillicuddy witnesses a tall, dark man strangling a blonde woman. She reports what she has seen, yet no one takes any notice.